C# 6 how to format double using interpolated string?

问题

I have used some new features of C# 6 incl. interpolated string for simple usage (showing message which contains string variables like $"{EmployeeName}, {Department}").

Now I want to use interpolated string for showing formatted double value.

Example

var aNumberAsString = aDoubleValue.ToString("0.####");

How can I write it as interpolated string? something like $"{aDoubleValue} ...."

回答1:

You can specify a format string after an expression with a colon (:):

var aNumberAsString = $"{aDoubleValue:0.####}";

回答2:

A colon after the variable specifies a format,

Console.Write($"{aDoubleValue:0.####}");

来源：https://stackoverflow.com/questions/37113595/c-sharp-6-how-to-format-double-using-interpolated-string